I'm a full-time Linux user so sometimes I run into a site that only works with IE. Here's an easy way to run Internet Explorer in Linux that I found last night:
Ask Ubuntu: How to install Internet Explorer (multiple versions)?
Microsoft has created some customized Windows VHDs with the purpose of allowing web designers to test websites in Internet Explorer 10, 9, 8 and 7, for Free for 30 days:
You can download the virtual machine images from this website: